The C++ Money class handles all functions for using decimal number monies. It eliminates problems associated with using C/C++ float or double to handle money (e.g., picking up or dropping odd cents due to rounding).

Calamaris parses the logfiles of a wide variety of Web proxy servers and generates reports about peak-usage, request-methods, status-report of incoming and outgoing requests, second and top-level destinations, content-types, and performance.

Calc is arbitrary precision arithmetic system that uses a C-like language. It's useful as a calculator, an algorithm prototype, and as a mathematical research tool. More importantly, calc provides a machine-independent means of computation. Calc comes with a rich set of builtin mathematical and programmatic functions.

Calcium provides interactive calendars you can use
through your browser. Features include: dynamic
calendar merging (events from one calendar can be
included in another), multiple views and formats,
repeating events, email support, extensive color
and font customization, support for full HTML in
the event text and calendar headers and footers,
popup text associated with any event, searching
and filtering, multi-language support, a flexible
security model, and more. Calcium is very easy to
use, and fully supported by an established
company. It runs anywhere that supports Perl CGIs;
no non-standard Perl modules are necessary. Full
2-way synchronization with Palm Pilots or MS
Outlook is available; iCalendar "subscriptions"
are supported too.

This is a PHP class that generates HTML output of a calendar month. It is based on the table wrapper base class. It generates output for any month of any year of the calendar, and it returns an HTML string that is compliant with XHTML. It also lets you customize the HTML properties and data format of the calendar's table cells in a subclass.

Cbrowser is a very feature-laden front end to the popular source code indexing and querying program cscope. It is also designed to work with the free alternative to cscope called cs. It provides a source code browser and function call tree hierarchy.

GNU ccScript offers a class extensible threaded embedded scripting engine for use with the Common C++ GNU package. This engine is also used in Bayonne (the GNU telephony server), and in TOSI (FreeBSD and GNU/Linux PBX integration servers). This engine differs from traditional scripting systems in that it is used to script near real-time state-event systems through deterministic callback step execution rather than the linear and non-deterministic fashion of embedded script libraries such as tcl, and libguile.